Category: Oracle

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Share some Database Application Development1Z0-148 exam questions and answers below.Examine the following SQL statement:
ALTER SESSION SET PLSQL_OPTIMIZE_LEVEL=3;
What is the result of executing this statements?
A. The PL/SQL optimize level for some existing PL/SQL units will be changed as an immediate result.
B. The PL/SQL optimize level for subsequently complied PL/SQL units will be set to 3 and inlining will be enabled.
C. The PL/SQL optimize level for subsequently compiled PL/SQL units will be set to 3 and inlining will be disabled.
D. This statement will fail because PLSQL_OPTIMIZE_LEVEL can only be set at the system level,
Answer: C

Which must be true in order to add RESULT_CACHE to a function header and have it compile successfully?
A. The IN parameters must not include BLOB, CLOB, collection or record data types.
B. The function must be created with invoker’s rights or in an anonymous block.
C. The function must be declared as a pipelined table function.
D. The function must have an OUT or an IN OUT parameter.
Answer: C

Which two statements are true with respect to fine-grained access control?
A. It is implemented by end users.
B. It can be used to implement column masking.
C. It implements security rules through functions and associates these security rules with tables, views or synonyms.
D. Separate policies are required for queries versus INSERT/UPDATE/DELETE statements.
E. The DBMS_FGA package is used to set up fine-grained access control.
Answer: C,D

Which statement is true about internal and external LOBs?
A. An external LOB can be loaded into an internal LOB variable using the DBMS_LOB package.
B. A NOEXIST_DIRECTORY exception can be raised when using internal and external LOBs.
C. Internal and external LOBs can be written using DBMS_LOB.
D. After an exception transfers program control outside a PL/SQL block, all references to open external LOBs are lost.
E. When using DBMS_LOB.INSTR for internal and external LOBs, DBMS_LOB.OPEN should be called for each LOB.
Answer: D,E

You are designing and developing a complex database application built using many dynamic SQL statements. Which option could expose your code to SQL injection attacks?
A. Using bind variables instead of directly concatenating parameters into dynamic SQL statements
B. Using automated tools to generate code
C. Not validating parameters which are concatenated into dynamic SQL statements
D. Validating parameters before concatenating them into dynamic SQL statements
E. Having excess database privileges
Answer: A

Which two statements describe actions developers can take to make their application less vulnerable to security attacks?
A. Include the AUTHID DEFINER clause in stored program units.
B. Do not concatenate unchecked user input into dynamically constructed SQL statements.
C. Switch from using DBMS_SQL to EXECUTE IMMEDIATE.
D. Include the AUTHID CURRENT_USER clause in stored program units.
E. Increase the amount of code that is accessible to users by default.
Answer: B,D

Which two statements are true regarding edition-based redefinition (EBR)?
A. There is no default edition defined in the database.
B. EBR does not let you upgrade the database components of an application while in use.
C. You never use EBR to copy the database objects and redefine the copied objects in isolation.
D. Editions are non-schema objects.
E. When you change an editioned object, all of its dependents remain valid.
F. Tables are not editionable objects.
Answer: E,F

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